Invasion of experimental rat brain tumor: early morphological changes following microinjection of C6 glioma cells (original) (raw)

Summary

We present morphological data of the early stage of tumor invasion in the central nervous system. C6 rat glioma cells were injected into the caudate-putamen of rat brain using glass micropipettes to minimize traumatic reactions. Four days after the inoculation, we examined the tumor-brain interface using light and electron microscopy. Ultrastructurally the tumor processes were attached to the perivascular basement membrane instead of the astroglial end-feet. At the tumor periphery, the vessel walls were in contact with both tumor processes and astroglial end-feet. Astrocytes withdrew their processes from the vascular walls and changed into a reactive phenotype, while the neuronal cells remained virtually intact, even when surrounded by tumor cells. Immunohistochemical study using C6 cells labeled with bromodeoxyuridine showed migration of the cells toward the perviascular space that was distant from the site of injection. These observations represent the earliest morphologically detectable changes of the tumor-brain interface, and suggest that the C6 cells possess the characteristics of high affinity to the endothelial basement membrane and invade along the preexisting blood vessels with brain parenchymal infiltration.

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Authors and Affiliations

  1. Department of Neurosurgery, Tokyo Medical and Dental University School of Medicine, 1-5-45, Yushima, Bunkyoku, Tokyo, Japan
    Nobuhisa Nagano, Masaru Aoyagi & Kimiyoshi Hirakawa
  2. Department of Anatomy, Tokyo Medical and Dental University School of Medicine, 1-5-45, Yushima, Bunkyoku, Tokyo, Japan
    Hiroshi Sasaki

Authors

  1. Nobuhisa Nagano
  2. Hiroshi Sasaki
  3. Masaru Aoyagi
  4. Kimiyoshi Hirakawa

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Nagano, N., Sasaki, H., Aoyagi, M. et al. Invasion of experimental rat brain tumor: early morphological changes following microinjection of C6 glioma cells.Acta Neuropathol 86, 117–125 (1993). https://doi.org/10.1007/BF00334878

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